Abstract
2-Amino-α-D-ribofurano[1′,2′:4,5]-2-oxazoline reacted with α-bromoacrylonitrile yielding 2,2′-anhydro-1-α-D-ribofuranosylcytosine which was converted to α-cytidine and α-2′-deoxycytidine. Reaction of 2-amino-α-D-ribofurano[1′,2′:4,5]-2-oxazoline and ethyl α-(bromomethyl)acrylate afforded 2,2′-anhydro-1-α-D-ribofuranosylthymine, a precursor of α-thymidine and α-ribothymidine.